Fastening device for phonograph-springs



e. T. CHERINGTON. FASTENING DEVICE FOR PHONOGRAPH SPRINGS- APPLICATION FILED OCT. 5, 1911;.

Patented July 20, 1920.

PATENT OFFICE.

GEORGE T. CI-IERINGTON, 0F WAUKEGAN, ILLINOIS.

. FASTENING DEVICE FOR PI-IONOGRAPI-I-SPRINGS.

Specification of Letters Patent.

Patented July 20, 1920.

Application filed October 5, 1918. Serial No. 257,016.

To all whom it may concern:

Be it lmown that I, GEORGE T. CHERING- TON, a citizen of the United States, residing at Waukegan, in the county of Lake and State of Illinois, have invented a certain new and useful Improvement in Fastening Devices for Phonograph-Springs, of which the following is a specification.

The usual and customary means of fastening a phonograph spring to the winding shaft is by having a lug or other projection secured to the winding shaft and a hole adjacent the end of the spring. This is satisfactory as long as there is a tension on the spring, but frequently if it is allowed to run down so that there is no tension, the spring will, by the loosening up, release the opening from engagement with the lug. This necessitates the removal of the shaft and spring container and spring in order to reengage the spring so it can be wound up.

My invention has for its object the provision of a fastening which cannot become 1 disengaged regardless of whether there is any tension on the spring or not.

My means of accomplishing the foregoing may be more readily understood by having reference to the accompanying drawings which are hereunto annexed and are a part of this specification, in which:

Figure 1 is a fragmentary view of a winding shaft and spring container, partly in section, showing a part of the spring and the fastening means.

Fig. 2 is a cross section taken 011 the line ,22 in Fig. 1.

Fig. 3' is a detail view of the end of the spring.

Similar reference numerals refer to similar parts throughout the entire description.

As shown inthe drawing, the winding shaft 4 has projecting from it, a lug or bolt 5, having an enlarged portion or head 6. The spring 7 has an opening adjacent its end 8'. This opening consists of a slot 9 which terminates in a circular opening 10 which is offset laterally from the slot 9 preferably enough to cause the edge 11 of r the slot 9 to pass'through the center of the opening 10. The latter is of suflicient size to permit the head 6 of the bolt 5 to pass through it. The spring 7 is mounted in the usual container orcasing, which, as illus- V trated, consists of a cup-shaped portion 12, and a cover or plate 13 which is secured to the cupshaped portion 12 by screws 14.

Although I have illustrated a specific form for this device, I do not wish to be understood as limiting myself to these forms, which are solely to show how my invention may be utilized as it is adaptable to any standard phonograph.

The operation is as follows:

The head 6 of the bolt 5 is inserted in the opening 10 and the spring drawn along until the bolt enters the slot 9; its head 6 extending over the adjacent sides holds the spring in position. The plate or cover 13 of the spring container is then fastened in place with the screws 14-. It will now be obvious that regardless of the tension of the spring, the bolt 5 can never become disengaged unless it is moved laterally or longitudinally of the winding shaft 4; and inasmuch as such movement cannot take place, with the removal of the plate 13, the spring never becomes disengaged, except by intention.

Having described my invention, what I regard as new and desire to secure by Letters Patent, is:

1. A fastening for phonograph springs comprising a headed pin fixedly mounted in a shaft, which engages the sides of an opening adjacent the end of the spring, said opening comprising a slot terminating in a circular opening at one end, the edge of said slot passing through the center .of the circular opening.

2. A winding shaft, a spring, means mounted in said shaft which engage said spring, there being an opening in said spring which engages said means but which cannot be disengaged unless the spring is moved longitudinally of the shaft.

3. A fastening for phonograph springs comprising a headed pin fixedly mounted in a shaft, which engages the sides of an opening adjacent the end of the spring, said opening comprising a slot having an en larged opening at one end which is offset laterally from said slot.

In testimony whereof, I have signed the foregoing specification.

GEORGE T. OHERINGTON. 

